Variable polarizing filters are made up of two high-grade glass individual filters; the variable darkening effect is produced by rotating the lower filter relative to the upper one; and it reduces glare without significantly altering the objects' colour for improved perception of detail and for better viewing comfort
This variable polarizing filter has a Aluminium material mount, which makes it difficult to be broken.
It helps you to adjust the brightness effectively. The variable polarizing filter allows for selective adjustment of brightness, which is useful for terrestrial observation and objects of the Solar System.
ED Element High-contrast Optics: The first time you observe an object through one of these eyepieces; you will almost certainly be struck by the brilliance clarity and depth of colour in the image
Long Eye Relief Comfortable Observing: The very generous 20 mm of eye relief means your observing is always completely comfortable for all the focal lengths available in this eyepiece series